See Also

Alcohol Use & College Attendance

Traditional-age college students (18-22) are more likely than others
to be heavy drinkers. However, as they mature (aged 26 and older),
they are much less likely to drink heavily than those who did not
attend college.

These findings are from the most recent National Survey on Drug
Use and Health, a federal study by the Substance Abuse and Mental
Health Services Administration (SAMHSA) of the US Department of
Health and Human Services.

References:

Substance Abuse and Mental Health Services Administration.
Results from the 2002 National Survey on Drug Use and Health.
Alcohol Use, Figure 3.3. The National Survey on Drug Use and Health
was formerly called the National Household Survey on Drug Abuse.